WASHINGTON — The capital flew into a bit of a tizzy when, on his first full day in the White House, President Obama was photographed in the Oval Office without his suit jacket. There was, however, a logical explanation: Mr. Obama, who hates the cold, had cranked up the thermostat.

Honest Tea

The rug is still there, as are the presidential portraits Mr. Bush selected — one of Washington, one of Lincoln — and a collection of decorative green and white plates. During a meeting last week with retired military officials, before he signed an executive order shutting down the prison at Guantánamo Bay, Cuba, Mr. Obama surveyed his new environs with a critical eye. “He looked around,” said one of his guests, retired Rear Adm. John D. Hutson, “and said, ‘I’ve got to do something about these plates. I’m not really a plates kind of guy.’ ”